@Andy1985 

Hi, Welcome to the community and Thank you very much for your feedback.

I think it might be too early to say Deco might be the problem and Here I draw a simple network layout based on your description and hope you could help me check whether there would be any mistakes, Thank you in advance.

Other than that, I hope you could help me check some details if possible.

1. I see you mentioned a compare test by "plugging in LAN Cable of my DVR on Ground Floor  and one PTZ camera to Jio Router", Will you be able to run the same test by only leaving the CCTV cam and DVR on the main XE75, temporarily powering off other Deco units and CCTV cameras?

2. I think the Airtel main router is also a DHCP server right, have you ever tried to change Deco XE75 to access point mode to see whether it helps with the current issue?

3. If only leaving the 5* Ethernet-connected CCTV cameras, and powering off the wireless cameras, will they play videos smoothly in Full HD or Hi-Def?

Thank you very much.

Best regards.

  @Andy1985 

Hi Andy,

Hope you are doing well! I haven't seen your update anymore and just wonder whether you are still having the same issue with Deco XE75.

Thank you and best regards.

  @Andy1985 

Hi, I tend to wish you could only leave the main Deco XE75 in the whole network and it does not matter the CCTVs in other rooms will tend to reconnect to the main XE75.

(But if it is convenient, it would be highly appreciated if you could also power off the CCTVs that are not connected to the main XE75.)

The reason I want to test it is that compared with Jio router, the most obvious difference between XE75 is its whole Mesh system. Unplugging other satellite XE75 will force it to work as a single router. And Turning off the smart IOT devices is also trying to simplify the network topology, just like the compared test you have done, only connecting one DVR and PTZ camera to the JIO router.

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As for the Wi-Fi interference within Deco units, since you haven't noticed any unstable connection on the IOT devices so far, I think the Wi-Fi condition is still acceptable. 

It is NOT mandatory to have two deco units in WIFI range to connect with each other and since the Ethernet connection is always more stable so actually it is recommended to connect them directly to LAN.

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As for the DHCP server suggestions, if Airtel router has a Wi-Fi function, normally it would be a modem-router combination and capable of DHCP. But if you are not sure, it does no harm to leave Deco as it is configured now so that we don't make the situation more complicated.

Thank you very much.

best regards.

  @Andy1985 

Hi, sorry that I have missed your reply.

Here are some information for your reference.

just to recheck you are suggesting to keep only Deco CE 75 on First floor which is connected to main router to be on power on and then connect one DVR on first floor with the LAN cable and one wifi camera which may connect if it catches range and keep all other IOT devices off . Hope this is what you are suggesting ??

Yes and it is what I wish you could test for me.

 Secondly what i feel the issue may be because last time once i went home i connected ground floor deco with LAN with first floor deco (Main Deco) and this resulted in boosting signal as it is connected by LAN , and these are one floor above the other , so can this be the reason of connection being slow . If the distance between Main Deco and satellite is not far off can this cause congestion in Network which results CCTV live feed getting hang .

As an alternative what i was thinking is that if i disconnect the deco on Ground Floor and the LAN cable which is coming from first floor i connect that with Switch and then connect the same switch with DEco in Shop and then check network , i think stability will be better . I think since these decos i have installed are not to far off from each other it may be causing network congestion , when i connect these deco without LAN , it shows full signal between Ground Floor deco and first floor .

 

So please confirm can this be the cause of concern ? Also can i connect one LAN coming from First Floor Deco to one switch on Ground floor and then another LAN Cable to another switch which is one room away and then this Switch i take one LAN cable to connect to Deco in Shop . So if i connect two switches between the deco hope it will not make difference . These are both unmanged Gigabit switches of TP Link 

The overlapping coverage between main and satellite could bring some interference but I don't think they have caused the congestion on the CCTVs.

The current network layout could be improved via Ethernet connection of Shop Deco. And since the 6Ghz wireless backhaul is not in use when two XE75 are connected via Ethernet cable, so Deco X60 would be better to be the satellite units which are connected via Ethernet cable and be the one placed in Shop.

 

If you are based out of India is it possible we can connect over the call once i am at my location in coming week ?

I am out ot India but since the network layout is quite complicated, I don't think we can talk clearly over the phone. 

But if needed, you could send an email to support.forum@tp-link.com for further discussion.

  @Andy1985 

As for the fast roaming and beamforming here, you could wait for a little longer since sometimes the APP needs time to sync the latest status, then check again whether these options are still enabled for no reason.

Best regards.